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Safety airbag igniting powder composition and preparation method of safety airbag igniting powder composition

A safety airbag and composition technology, applied in the direction of explosive compound components, explosive processing equipment, explosives, etc., can solve the problems of low temperature ignition, poor safety performance of potassium boronitrate ignition powder, unfavorable production, etc., achieve good low temperature ignition ability, solve Low temperature internal pressure curve with double peaks, not easy to break and wear

Inactive Publication Date: 2017-05-24
HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The purpose of the present invention is to solve the problem of overcoming the need to design sealing foil or medicine cup technology when using granular igniting powder, and provide an airbag igniting chemical composition, while solving the problems of poor safety performance and unfavorable production of current potassium boron nitrate igniting powder , and solve the low-temperature ignition problem that occurs when the current ignition powder ignites some gas generants

Method used

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  • Safety airbag igniting powder composition and preparation method of safety airbag igniting powder composition
  • Safety airbag igniting powder composition and preparation method of safety airbag igniting powder composition

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Effect test

Embodiment 1

[0040] 15% boron powder, particle size d 50 The range is 8μm~20μm; 84% ultrafine potassium nitrate, particle size d 50 The range is 15μm~20μm; the content of graphite is 1%; the weighed powder is added to the mixer in turn, and the ceramic ball is used as the mixing medium to obtain a uniform powder after mixing; after granulation by the wet granulation process, sampling and testing For the safety performance of the granules, the granules are compressed and formed by a rotary tablet press with a rotational speed of 60 rpm. The diameter of the compressed cylindrical tablet is 3mm, and the thickness of the tablet is 1.4mm±0.1mm; then weigh 3.2g. The ignition powder tablet is put into the igniter of the gas generator, and the gas generating agent with guanidine nitrate and basic copper nitrate as the main components is used. The weight of the gas generating agent is 60g, and the assembly and welding of the gas generator are completed. After placing the gas generator in a -40℃±2℃...

Embodiment 2

[0042] 15% boron powder, particle size d 50 The range is 8μm~20μm; 84% ultrafine potassium nitrate, particle size d 50 The range is 15μm~20μm; 1% content of boron nitride powder; the weighed powder is added to the mixer in turn, and the ceramic ball is used as the mixing medium, and the uniform powder is obtained after mixing; after granulation by the wet granulation process , take samples to test the safety performance of the granules, and the results are shown in Table 1.

Embodiment 3

[0044] 15% boron powder, particle size d 50 The range is 8μm~20μm; 84% ultrafine potassium nitrate, particle size d 50 The range is 15μm~20μm; 1% content of mica powder; the weighed powder is added to the mixer in turn, and the ceramic ball is used as the mixing medium to obtain a uniform powder after mixing; after granulation by the wet granulation process, sampling The safety performance of the granules was tested, and the results are shown in Table 1.

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Abstract

The invention provides a safety airbag igniting powder composition, aiming at overcoming the disadvantage that a sealing foil or a powder cup needs to be designed when grain-shaped igniting powder is used, the problem that the safety performance of boron-potassium nitrate igniting powder is poor, and a low-temperature igniting problem. The safety airbag igniting powder composition is prepared from the following components according to the content: 10 percent to 20 percent of boron powder, 80 percent to 90 percent of potassium nitrate and 0 to 2 percent of a process auxiliary agent; the components are pressed and molded through a rotary tablet press so as to prepare cylindrical powder sheets. The safety airbag igniting powder composition is mainly appalied to an igniting device of a safety airbag gas generator and has the main characteristics that igniting powder has relatively good safety performance and mechanical sensitivity including friction sensitivity and impact sensitivity is relatively small; the safety airbag igniting powder composition is not exploded basically under the stimulation of friction and impact effects. Meanwhile, the igniting powder can still be normally ignited at a low temperature of -40 DEG C+ / -2 DEG C, and a phenomenon of double peaks of an indoor pressure curve of the gas generator, namely secondary explosion, under a low-temperature condition does not occur; the igniting powder has the advantages of rapid ignition and slow starting pressure.

Description

technical field [0001] The invention relates to an ignition powder for an airbag gas generator. [0002] technical background [0003] Ignition powder is mainly used in the ignition system of automobile airbag gas generators, and is used in pyrotechnic, mechanical and hybrid gas generators. The main function is to generate a lot of heat and more solid particles or hot gases through self-decomposition. These high-temperature gases or hot solid particles conduct heat to the gas generating agent, thereby igniting the gas generating agent to generate gas. [0004] At present, there are many types of ignition powders for airbag gas generators, and some types of ignition powders and formulations have also been reported in some domestic and foreign patents, such as: [0005] US6599380 mentioned an airbag ignition powder, the main components are guanidine nitrate, perchlorate, copper oxide and aluminum powder, the ignition powder has a good oxygen balance, so the generated substance...

Claims

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Application Information

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IPC IPC(8): C06B33/04C06B21/00
CPCC06B33/04C06B21/0008C06B21/0066
Inventor 刘伟刘亮姚俊张宁陈樊冯涛
Owner HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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